Abstract
Plants often experience variations in light intensity, referred to as light stress, that negatively impact important aspects of plant growth and development, including photosynthesis and antioxidant system. The photosynthetic machinery is susceptible to these disturbances, especially photosystem II and its reaction centers. We aimed to evaluate the role of brassinosteriod in plants under both high and low light conditions by examining various physiological parameters such as photosynthetic efficiency, pigment levels, and enzymatic activity of various antioxidant enzymes in one month old tomato plants. We investigated various chlorophyll fluorescence parameters under low light (LL) and high light (HL) conditions and the associated gene expression related to photosynthesis, including plastocyanin, ferredoxin, and photosystem II oxygen-evolving enhancer protein 3 (PsbQ). Our results indicate that exogenous brassinosteroid application considerably increased tolerance to both high and low light stress in 4-week-old tomato as treated plants displayed enhanced photosynthesis, reduced oxidative damage, and increased antioxidant enzyme activity in comparison to control plants. Furthermore, brassinosteroid treatment enhanced the expression of genes associated with antioxidant pathways, which significantly contributed to the recovery of chlorophyll fluorescence parameters crucial for plant growth and development. Our results provide valuable insights into how brassinosteroid reduces light-induced stress in tomato plants.
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Claims 6
Claim · model-written summary
Brassinosteroid increased tolerance to high and low light stress in tomato.
- Taxon
- tomato
Solanum lycopersicume0 - Organ / stage
- 4-week-olde0
- Treatment
- exogenous brassinosteroid applicatione0
- Outcome
- tolerance to both high and low light stresse0
- Direction
- increasede0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous brassinosteroid application considerably increased tolerance to both high and low light stress in 4-week-old tomato as treated plants displayed enhanced photosynthesis, reduced oxidative damage, and increased antioxidant enzyme activity in comparison to control plants”
Claim · model-written summary
Treated tomato showed enhanced photosynthesis relative to controls.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- exogenous brassinosteroid applicatione0
- Outcome
- photosynthesise0
- Direction
- enhancede0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous brassinosteroid application considerably increased tolerance to both high and low light stress in 4-week-old tomato as treated plants displayed enhanced photosynthesis, reduced oxidative damage, and increased antioxidant enzyme activity in comparison to control plants”
Claim · model-written summary
Treated tomato showed reduced oxidative damage relative to controls.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- exogenous brassinosteroid applicatione0
- Outcome
- oxidative damagee0
- Direction
- reducede0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous brassinosteroid application considerably increased tolerance to both high and low light stress in 4-week-old tomato as treated plants displayed enhanced photosynthesis, reduced oxidative damage, and increased antioxidant enzyme activity in comparison to control plants”
Claim · model-written summary
Treated tomato showed increased antioxidant enzyme activity relative to controls.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- exogenous brassinosteroid applicatione0
- Outcome
- antioxidant enzyme activitye0
- Direction
- increasede0
- Comparator
- control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous brassinosteroid application considerably increased tolerance to both high and low light stress in 4-week-old tomato as treated plants displayed enhanced photosynthesis, reduced oxidative damage, and increased antioxidant enzyme activity in comparison to control plants”
Claim · model-written summary
Brassinosteroid enhanced expression of antioxidant pathway genes.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- brassinosteroid treatmente0
- Outcome
- expression of genes associated with antioxidant pathwayse0
- Direction
- enhancede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“brassinosteroid treatment enhanced the expression of genes associated with antioxidant pathways”
t0“tomato”
Claim · model-written summary
The authors attribute recovery of chlorophyll fluorescence parameters to enhanced antioxidant gene expression under brassinosteroid treatment.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- brassinosteroid treatmente0
- Outcome
- recovery of chlorophyll fluorescence parameterse0
- Qualifier
- expression of genes associated with antioxidant pathwayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“brassinosteroid treatment enhanced the expression of genes associated with antioxidant pathways, which significantly contributed to the recovery of chlorophyll fluorescence parameters”
t0“tomato”
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Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.